Electric ignition device.



J. J; LOMBARDI. ELECTRIC IGNITION DEVICE. APPLICATION FILED 00126, 1907.

Patented June 25, 1912;

w Q 3 1 f luMmla X z a T J \\\\\\\\W..IQ,

, Wineass.

UNITED STATES PATENT OFFICE;

aosnrn a; nommmnr, or new roux,- n. Y.

ELECTRIC IGNITIOhT DEVICE;

speciflcatipn of Lettcrs Patent. I

Application filed October 26,1907. Serial No. 399,282. I

To all whom it may concern: i

Be it known that I,-JosnrH J. LOMBARDI,

a citizen of the United States, and resident of the borough ofManhattan, in the city and State of New York, have invented a new anduseful Improvement in Electric Ignition Devices, of which the followingis a specification.

My invention relates to an improvement in electric ignition devices andhas for its object to provide certain improvements in the construction,formand arrangement of the several parts of an electric ignition devicewhereby the liability of misfiring due to the sparking pointsbecomingcovered with soot or the completion of the electric circuit from theelectrode to the base of the device before reaching the sparking pointis obviated.

A further object is to provide means for easily and minutely adjustingthe relation of the sparking points so that the gap between .theliimaybe increased or diminlshed in' the very slightest degree and lockedin such position wlthout the necessity of bendthe electrodesis denotedby land it is'pro-j in s in whiching or distorting the parts.

-A practical embodiment of my invention isrepresented in-theaccompanying draw- 30 igure l is a longitudinalcentral section throughthe device, Fig. 2 is a side elevan tion of the same, and Fig. 3 is aninner end' view of the device. o

The conducting wire which forms one of vided at its inner end with asparkin 2 offset from the axis of the com? 'wire. This conducting wireispreferably screw-threaded exteriorly for a portion of point its lengthfor-the. purpose of securing the .wire to the insulatmg block 3. Thisinsulating block 3 surrounds the conducting -wire 1 for a considerableportion of its length, which block comprisesla reduced tubular-portion 4and a cup-shaped enlarged ortion 5. The means for securing theconducting wire 1 to'theinsulating block comprises a' shoulder 6 whichmay be a. nut

' screwed onto the wire in position to engage the block within thecup-shaped portion,

and a nut 7 arrang d in position to engage the. outer end "o *saidinsulating bloc Washers 8, 9, may be interposed between the nuts 6; 7,and the insulating block.

The hollow base 10- embraces the cup-' shaped'end of the insulatingblock, said base ucting being provided with an interior annular shoulder11 which is engagedby the inner end of. the cup-shaped portion of theinsu- 'lating block. Between the inner-end of the,

insulating block and the interior annular Patented June 25, 1912'.

shoulder 11 on the base, a'washer 12 is inserted, which washer iscomposed of some suitable packing material, preferably mica. V

A cap 13 embraces the reduced portion of the insulatingblock and has ascrewthreaded engagementlwith the outer end of the base 10. A washer 16of some suitable packing material, preferably vegetable fiber, isinterposed between the annular shoulder 15 formed by the reduction ofthe exterior dimension of the insulating block, and-the inner end 14 ofthe cap 13. .These washers 12 and- 16 serve to prevent leakage betweenthe insulating block and base and also allow the insulating block toexpand slightly under the influence of heat, thus preventing the blockfrom cracking or breaking.

i The base 10 has an enlarged outer portion .17 and also a reduced innerend portion 17*, which portion 17 is intendedto be brought intocommunication with the combustion chamber of an internal combustionengine.

This reduced inner-end portion 17* may be provided with an exteriorscrew-threaded portion for permitting. its engagement with the cylinderwall of the engine in connection with which the device is to be used.The end of this reduced end portion of the base .is provided with acircular aperture 18 -wh1ch is so situated. as to be eccentric to the 5axis of the conducting wire 1 when the parts of the ignition device are"in assembled adjustment. By making'the aperture eccen oint of ing thesa'me'at an angle to'the conducting wire so; that as the conductin wireis turned,

the sparking point will be rought toward and away rom the wall of. theaperture. After the parts have been adjusted with the greatest accuracyto the pomt which W111 'g-oduce the best results,the lock nut! mayconducting wire to the ase. ment also prevents any tendency on the partend of .is s aced a considerable distance -from the conductingI wireservin e ec tightened so as to secure the parts in said adjustment.vThis adjustment of the spark p is an important feature of my inventionor' the reason that the slightest variation in the distance between thes 'arking points affects the value of the spal lr. ,4 1 The walls' ofthe recess 19 in the reduced portion 17 of the base form a continuationof the walls of the recess 5" in the cupshaped inner portion of theinsulating block 3 so as to form a sparking chamber around theconducting wire 1. Also b projecting the inner ortion of the con uctingwire centrally t rough the recesses in the cupshaped plortion of theblock and the reduced t e baselO, the said conducting wire wal of thebase and-the wall of the insulating block, thus obviating possibility'ofshort-circuiting b the continuous deposit of carbon which will brid ethe space from the his arrangeof the current to 'ump between the wireand the base at an ot er place than at its sparking points.

his construction also tends to prevent the accumulation of carbondeposit gnd'koil in the recess 5* of the insulating An 1 ition devlceconstructed 1n accord- .anee w1th m V invention will be extremely strongand urable and can be used for a long time without cleaning, theinclosed chamber surrounding the inner end of the 7 to produce a selfcleaning twhich w point on the conductingwire'and the walls of theaperture clean and thus at their highest efliciency.

t e said conducting wire and an an le to the axis of the latter.

my invention, I have sign keep the sparking What I claim is:

1. An electric ignition device comprising a hollow base portion, aninsulating block fitted therein, a conducting wire rotatably mounted inthe insulating block, the said base portion being provided with a truecircular opening in its inner end eccentric to the axis ofthe saidconducting wire, and a s arking point secured to the inner end ofprojecting at 2. electric ignition device comprising a hollow baseportion, a hollow insulatmg block fitted therein and provided with acupshaged portion, a cap for holdin the block in t e base, a conductingwire 0 relatively small diameter rotatably mounted in said block, and asparking po1nt fixed in the inner end of the conducting mm andprojecting at an angle to the axis thereof, said base portionbeingprovided in its inner end with a true circular opening eccentric to theaxis of the said wire, whereby the rotation of the said wire will causethe said point to approach or recede from the walls of said open- 1n gat an even rate while the conducting w1re proper remains the same axialdistance from the walls of the said openings, and the I said recesses inthe block and base bein so arranged as to form a continuous ho owchamber of uniform diameter about ducting wire proper. o

' Intestimony, that I claim the foregoing as ed my name in presence oftwo witnesses, this twenty-third day of October 1907.

' JOSEPH J. LOMBARDI. Witnesses:

F. Gnonon BARRY, HENRY THIEME.

the con-

